8 Responses. > 1  the Moon takes an elliptical path around the Earth. The planets make nearly elliptical orbits around the Sun, close enough for reasonable approximations, but the Moonâs Orbit around the Earth is sufficiently influenced by the Sun that it follows a path detectably different from an ellipse.
Quick Answer. In 1896, French scientist Antoine Henri Becquerel discovered radioactivity which was an early contribution to atomic theory. He discovered this phenomenon while experimenting with uranium and a photographic plate. Continue Reading.
He called them corpuscles, we know them as electrons. He made the Plum Pudding Model of an atom in which the electrons were stuck randomly in a chunk of positively charged matter, like plums in pudding. Rutherford-1909-1911-Shot atoms at gold foil and discovered atoms are mostly empty space.